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How to stop black smoke comin from exhaust pipe?

Tiny
MAJID BALOCH
  • MEMBER
  • 1999 NISSAN 180SX
  • 300,000 MILES
When I drive the car gives black smoke. The black smoke comes out too much when I put full accleration otherwise its nt much. And it smells also of petrol
Friday, November 11th, 2011 AT 6:15 AM

2 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Well, you are DEFINATELY running too RICH with FUEL! This canbe caused by MAF sensor or TEMP sensor or something else. Is your service/check engine light on?
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Friday, November 11th, 2011 AT 6:43 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
You also could have a leaking/bad fuel pressure regulator. It leaks raw fuel into manifold making overfuel condition which would produce black smoke. Take off vaccuum hose to regulator and check for wetness/gas in hose.
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Friday, November 11th, 2011 AT 6:49 AM

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